Paradigms lost, wisdom gained

Tycho Brahe lived with a hand-crafted nose made of brass after his real one was sliced off in a duel. Mr. Brahe was a renowned 16th-century Danish astronomer and a great empirical scientist whose data were used to formulate Johannes Kepler’s three laws of planetary motion. But for our purposes, Tycho Brahe is especially interesting for something other than his prosthetic schnoz or his contributions to astronomy, but for a notable mistake.